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what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: space-time
Date: October 30, 2008 04:51PM
they seem to have the same size, same voltage, same chemistry, and about the same price. Thus one would ask why two different numbers for the same type of battery.

Thanks
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: Racer X
Date: October 30, 2008 04:53PM
dimensions must be different in some way, even if just .010" Look on-line for some battery size charts. they will give you the full answer.



Edited 1 time(s). Last edit at 10/30/2008 04:54PM by Racer X.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: N-OS X-tasy!
Date: October 30, 2008 05:14PM
One.



It is what it is.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: space-time
Date: October 30, 2008 05:24PM
I was sure some smart a$$ was gonna say that.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: N-OS X-tasy!
Date: October 30, 2008 05:40PM
Yeah, but at least I made the extra effort to actually spell out the word. tongue sticking out smiley



It is what it is.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: Mike Johnson
Date: October 30, 2008 05:50PM
One would be high drain (KOH), the other low drain (NaOH). But now you can get so-called multi-drain batteries which use silver oxide. A multi-drain battery typically sports both numbers, and would replace either.



Edited 1 time(s). Last edit at 10/30/2008 05:51PM by Mike Johnson.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: space-time
Date: October 30, 2008 05:56PM
Thanks Mike, that makes sense, the one in my watched had both numbers on it, and it must have been Silver Oxide.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: Racer X
Date: October 30, 2008 05:57PM
space-time made the assertion that they were the same chemistry, but I think Mike is likely right.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: space-time
Date: October 30, 2008 05:59PM
Quote
Racer X
space-time made the assertion that they were the same chemistry, but I think Mike is likely right.

well, at batterybob.com they sell both 363 and 364 and they're both Silver Oxide. I didn't know that originally they were different chemistries that were both replaced by Silver Oxide.

Thanks all for the input.
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Re: what's the difference between watch/hearing aid batteries No 363 and 364?
Posted by: Racer X
Date: October 30, 2008 06:04PM
you need to be careful when doing battery swaps though. Some older devices were designed for mercury batteries which were I think 1.55 volts, and had a very flat discharge rate. Some of the newer chemistries are about 1.35, and output on a curve. The earlier devices didn't have any voltage compensation ability, so they would be off. Old match-needle metered cameras spring to mind. With a silver oxide battery, the light meter would be off, and just get worse as the battery drained. Just an example. I have a battery powered microphone that takes a mercury PX27 battery. Same issue. Starts out barely OK, but as the silver oxide battery drains, you need to crank up the gain on a the sound mixer. PITA.
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